The effect of ultrasonic cleaning is related to the elastic modulus of the material. Using the difference of energy absorption intensity of high-frequency mechanical vibration, different materials have different ranges of stripping foreign matters. The elastic modulus of plastics is much smaller than that of metals, and the absorption of ultrasonic waves is also very strong. Due to its soft texture, plastic is very different from stainless steel, and its corrosion resistance is poor, so it cannot be cleaned in corrosive liquid. In fact, we should understand that the absorption of high-frequency mechanical vibration energy by different materials is very different, and the plastic strength is far less than that of metal materials.
In fact, it is quite possible. Through the test of professional engineers in the factory, ordinary plastics can indeed be cleaned by ultrasonic. The cleaning solution is very good. The cleaning temperature is about 50. Especially in cold weather, if the temperature of the cleaning solution we put in is low, the cavitation effect and cleaning effect will become worse. Therefore, when using ultrasonic cleaning equipment for cleaning, we must learn to control the ultrasonic cleaning temperature according to different materials. If the control is not good, it will cause irreversible damage to the workpiece.
In addition, in cold weather, if the temperature of the cleaning solution is low and the cavitation effect is not good, the cleaning effect will be poor. When the temperature rises to the appropriate temperature, the gas pressure in the cavitation bubble increases, and the final cleaning effect will be very good. Therefore, it is found that some cleaning machines wrap heating wires around the outside of the cleaning cylinder for temperature control. Cavitation is easy to occur when the temperature rises, so the cleaning effect is good.
When the temperature continues to rise, the gas pressure in the cavity increases, causing the impact sound pressure to drop, reflecting the multiplication of these two factors. The ultrasonic cleaning machines on the market now have a temperature adjustment function, which is generally adjustable from normal temperature to 95 degrees. The specific temperature during cleaning is mainly determined by the cleaned objects and dirt.
For cleaning oil dirt, the cleaning solution needs to have a certain temperature to achieve a good cleaning effect. For example, when we wash dishes, the cleaning effect is different between heated water and no hot water, while maintaining the water temperature of ultrasonic cleaning at 50~60 ℃ is a good cleaning temperature, and the cavitation effect of this temperature is better.
Shandong ultrasonic cleaning machine manufacturers believe that if the cleaning agent is added, the higher the temperature, the more significant the effect. At 50~60 ℃, most of the active enzymes are very active, which is a very efficient temperature range for material decomposition. Therefore, if it is necessary to remove oil stains, it is very appropriate to choose 50~60 ℃. At present, all the degreasing ultrasonic cleaning machines on the market have heating function.
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